#include <iostream>

using namespace std;

class ClasseA{
public:
    int vel;
        void muda_vel(){
            vel = 3;
}
int get_vel(){
    return vel;
}
};
//************************************
class ClasseB{
public:
    void acesso();
};

ClasseA *a2 = new ClasseA();
void ClasseB::acesso(){
    a2->muda_vel();
}

//*************************************
int main()
{
    ClasseA *a1 = new ClasseA();
    ClasseB *c1=new ClasseB();
    c1->acesso();
    cout << a1->get_vel() << endl;
    return 0;
}